This allows you to abort if the art is different - even if
someone has modified your ~/.ssh/known_hosts file!

Uh oh, this is bad...

Seen this before?

$ ssh -o VisualHostKey=yes somemachine@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
b8:5a:1e:47:77:a8:f5:14:bc:d2:25:99:50:55:f6:f7
Please contact your system administrator.
Add correct host key in /home/xlr/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/xlr/.ssh/known_hosts:14
remove with: ssh-keygen -f "/home/xlr/.ssh/known_hosts" -R somemachine
RSA host key for localhost has changed and you have requested strict checking.
Host key verification failed.